Not ideal, but the best solution I've found so far for moving text between the command line and other applications in urxvt is setting Bash to vi mode and then

Not ideal, but the best solution I've found so far for moving text between the command line and other applications in urxvt is setting Bash to vi mode and then using visual mode for yanking/putting. I have Vim as my $EDITOR, which is opened when entering visual mode (I believe opening the editor is default Bash behavior). Vim is set to use the system clipboard ("set clipboard=unnamedplus" in the .vimrc) so from there I can bus text to/from other applications. Dealing with stdout/err is another beast...